As Tx-Beau mentioned in an earlier post, the constitution does not define what 'arms' are or aren't. As such, there is no constitutional weight behind the right to bear a firearm, beyond what is 'understood' at any given time to be meant by the amendment. The right is already restricted, due to its fundamental point conflicting with good sense, so rocket launchers and missiles and bombs, despite being arms, are not allowed. This is the result of current understanding.
It is determined that the common man has the right to bear arms that the common soldier possesses. This suggests that it would be very easy to ban handguns, simply by disarming soldiers from having them. It cannot be argued that the government are trying to deny your precious right either, since you already recognize that they have a responsibility for rules regarding the arming of the militia, and that in banning handguns, they are effectively arming you with the kind of firearms they want, i.e, shotguns and rifles, in the same vein that your tax credit incentive allows for them to do, except, this way, its cheaper, and saves lives by cleaning up the streets of weapons.
You can't say they can't ban handguns, because you don't have the right to choose what you 'keep and bear' ONLY that you have the right to do so. So if you only have shotguns or rifles available to you, you're right is uninfringed.
And this argument about criminals going to the effort to make their own weapons if they can't obtain them via purchase or theft is truly a joke. It barely happens here in the UK, most weapons are in fact smuggled in rather than homemade. Why? Because its a crime to make them, so you get harsher penalties when its no longer just possession of firearms, but manufacturing too.
The pro gun lobby uses every possible argument it can to create a bog of an issue in order to detract from the inevitable, that you only have your 2nd amendment rights secured by the support of the people, most of whom can be reasoned with and change their minds about what 'understanding' arms pertain too, should they get pig sick and tired of seeing people killed all the time. And statistics would show that the younger generations are far less in favour of guns than those before them.